Routing machine



Dec. i1 192s. 1,611,381

A. L. SALSBURY ROUTING MACHINE Filed June 5, 1926 Patented Dec. 21, 1926.

UNITED STATES PATENT OFFICE.

' ARTHUR L. SAL-SB'URY, OF SIOUX CITY, IOWA.

ROUTING MACHINE.

Application filed June 3,

My invention relates to routing machines of the port-able type having an open ringshaped base, and it is my object to prov ...e

such a machine which is of extremely light construction to facilitate handling by the operator.

More particularly it is my object to provide a machine in which a very fine vertical. adjustment of the motor is obtained by slidably mounting the motor on a pair of posts, which serve also as handles for the two hands of the operator. and are of such construct-ion as to interfere to the least possible degree with the View of the operator.

A further object is to provide such a routing machine, mounted upon such a pair of posts and having means for vertically adjusting the motor relative to said posts, and means for locking the motor relative to said posts so that the vibration thereof will not act upon said vertically adjusting means.

An important object of my invention is to provide such a routing machine to accomplish the foregoing objects, and yet which is of the utmost simplicity and cheap ness of construction without sacrificing durability.

With these and other objects in view, my invention consists in the construction, arrangement and combination of the various parts of my device, whereby the objects contemplated are attained, as hereinafter more fully set forth. pointed out in my claims and illustrated in the accompanying drawings, in which:

Fig. 1 is a plan view of the machine.

Fig. 2 is an elevation of the machine.

Fig. 3 is a vertical sectional view, taken through the supporting and adjusting mechanism of the machine.

Fig. 4 is a horizontal sectional view, taken on the line 4-4 of Fig. 2.

I am aware that it is not new in routing machine construction to provide a motor driven bit, mounted over a ring-shaped base to support the bit upon the work and yet to allow the operator to view the work. The most usual form of portable machine employs such a base and a screw threaded motor housing, into which the motor is threaded to allow vertical adjustment. Such a construction is rather expensive, and there is a need for a cheap and more simple form of portable machine.

I have obtained extreme simplicity and cheapness of construction, together with 1826. Serial No. 113,435.

other advantages which will hereinafter appear in the machine shown in the crawings, in which the numeral. 10 has been used to indicate a ring-shaped base, preferably of cast aluminum or some such light metal. A ring 01 celluloid or felt, 11, is secured to the base to prevent scratching of the work as the base is slid thereover.

A pair of posts, 12, are cast integrally with the base and are positioned diametrically opposite each other. Into the upper ends of "he posts 12, are threaded studs, 13.

The motor, 14, has the usual shaft, 15, carrying a chuck, 16, in which may be secured a bit, 17.

Secured to opposite sides of the motor casing, by means of screws, 18, are sleeves, 19, provided with vertical openings, 20, diametrically opposed to each other. The openings, 20, are somewhat larger than the studs, 13, as appears in Fig. 3, and loosely receive the studs. Thumbs nuts, 21, are threaded upon the studs below the sleeves and support the weight of the motor, and lock-nuts, 22, are threaded onto the studs above the sleeves.

The base, 10, is placed upon the etching or plate to be finished, and the thumb nuts, 21, are rotated downwardly to bring the bit, 17, into engagement with the work. The lock nuts, 22, are then rotated downwardly and tightened against the ears, 19, to prevent chattering or jerking of the motor.

I find that it is necessary to maintain the lock nuts tightly engaged against the ears, 19, in order to prevent the vibration of the motor acting upon the thumb nuts, An looseness in the engagement of the ears, 19, with the nuts, 21, will allow such vibration to cause the nuts, 21, to rotate downwardly from their respective spindles,

The height of the bit may be adjusted while the motor is in operation by adjusting and holding the nuts, 21, with the outer fingers or the palms of the hands, and rotating the lock nuts, 22, between the thumbs and first fingers of the respective hands of the operator.

It is apparent that the construction is a very inexpensive one. The standard type of motor hous ng may be used, and the ears, 19, may be readily secured thereto. The base is formed of a single casting, and the studs, 19, are of standard threaded. rods, tapped into the posts, 12.

Some changes may be made in the con struction and arrangement of the parts of my invention without departing from the real spirit and purpose of my invention, and it is my intention to cover by my claims any modified forms of structure or use of mechanical equivalents which may be reasonably included Within their scope.

I claim as my invention:

1. In a routing machine, a ring-shaped base hav ng a pair of upwardly projecting diametrically opposed posts, threaded studs secured in said posts and projecting up Wardly therefrom, a motor having a bit projecting downwardly through said ring, said motor having a pair of diametrically opposed ears provided with vertical openings loosely receiving said studs, and thumb nuts on the studs above and below said. ears.

2. A routing machine comprlsing a ringshaped base, a pair of threaded studs secured to said base in diametrically opposed positions and extending upwardly therefrom, a motor having a bit project ng downwardly through said ring, said motor having a pair of diametrically opposed ears provided with vertical openings loosely receiving said studs, and thumb nuts on the studs above and below said ears.

3. A routing machine comprising a. ringshaped base having a pair of integral, diametrically opposite, upwardly extending posts, threaded studs secured in said posts and projecting upwardly therefrom, a motor having a bit projecting downwardly through said ring, said motor having a pair of diametrically opposed ears provided with vertical openings loosely receiving said studs, and thumb nuts on the studs above and below sa d ears.

Signed at Sioux City, in the county of Woodbury and State of Iowa, this 27 day of May, 1926.

A. L. SALSBUBY. 

